iWork.com is dead. Long live iWork.com!
Today is the last day that you'll be able to sign into the iWork.com beta. Apple's first attempt at creating a document sharing environment for Pages, Numbers, and Keynote documents never did make it to prime time. Tomorrow, iWork.com goes the way of the dodo and MobileMe.
Apple has built in the capability of sharing your documents between your own devices via iCloud, with a recent update to the OS X version of iWork adding the ability to save to and read from iCloud.
Any documents you have stored on iWork.com should have been moved to your iCloud account, provided that you used the same Apple